Sanwa CD770 Manuale utente

CD770

DIGITAL MULTIMETER

INSTRUCTION MANUAL

CD表紙_英 06.4.28 3:20 PM ページ 1 (1,1)

Table of Contents

【1】

SAFETY PRECAUTIONS – Before use, read the following safety precautions.-

1-1 Explanation of Warning Symbols ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯001

1-2 Warning Messages for Safe Use ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯001

1-3 Overload Protection⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯002

【2】APPLICATIONS AND FEATURES

2-1 Applications ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯003

2-2 Features ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯003

【3】NAMES OF COMPONENT UNITS

3-1 Meter ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯004

3-2 Test Leads ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯004

3-3 Display ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯005

【4】DESCRIPTION OF FUNCTIONS

4-1 Power Switch & Function Switch ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯006

4-2 Measuring Function Selection: ⋯⋯⋯⋯⋯⋯⋯⋯006

4-3 Data Hold: ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯006

4-4 Range Hold: ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯006

4-5 Relative Measurement: ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯007

4-6 Auto Power Off⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯007

4-7 Battery Low Warning Indication⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯007

【5】MEASURING PROCEDURE

5-1 Start-up Inspection ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯008

5-2 Voltage Measurement ( )⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯010

5-3 Resistance Measurement ( ), Diode Test ( ),

Continuity Check ( ) ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯011

5-4 Frequency Measurement ( ) ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯012

5-5 Capacitance Measurement ( ) ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯013

5-6 Current Measurement (

)⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯014

【6】MAINTENANCE

6-1 Maintenance and Inspection ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯016

6-2 Calibration and Inspection ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯016

6-3 Storage ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯016

6-4 Battery and Fuse Replacement⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯016

【7】After-Sale Service

7-1 Warranty and Provision ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯018

7-2 Repair ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯018

7-3 SANWA web site ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯019

【8】SPECIFICATIONS

8-1 General Specifications ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯020

8-2 Measuring Range and Accuracy ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯021

CD770P_英本文_四 06.4.28 3:38 PM ページ 2 (1,1)

The following instructions are intended to prevent personal injury such as

burn and electric shock. Be sure to follow them when using the meter:

1. Never use the meter for power lines exceeding 6 kVA.

Voltages above 70 VDC or 33 Vrms AC (46.7 V peak) are hazardous

to human body. Never touch them.

Never input signals exceeding the maximum rated input value (see 1-3).

WARNING

[1] SAFETY PRECAUTIONS

*Before use, read the following safety precautions.

This instruction manual explains how to use your new digital multi

meter CD770.

Before use, please read this manual thoroughly to ensure correct

and safe use. After reading it, keep it together with the product for

reference to it when necessary.

The instructions given under the headings of “ WARNING” and

“ CAUTION” must be followed to prevent accidental burn and

electric shock.

1-1 Explanation of Warning Symbols

The meaning of the symbols used in this manual and attached to

the product is as follows:

:Very important instructions for safe use.

•The warning messages are intended to prevent accidents to

operating personnel such as burn and electric shock.

•The caution messages are intended to prevent incorrect

handling and measurement which may damage the product.

: Capacitor : Alternating current (AC)

: Double insulation or reinforced insulation

: High voltage hazard : Diode

: Direct current (DC) : Buzzer

: Ground : Fuse

: Resistance : Frequency

1-2 Warning Messages for Safe Use

—1—

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—2—

DC･AC600V

0.5A/250V fuse

Breaking capacity 1.5kA

Function Input Terminal

Max. Rated Input Value

Max. Overload Protection Input Value

V • Hz

DC･AC 400µA

Do not input a voltage .

DC･AC600V

Do not input a

voltage or current.

/ / •

and

DC･AC 400mA

Do not input a voltage .

04.

Never use the meter for measuring voltages of lines connected to

equipment (e.g. motors) that generates induced or surge voltage

since it may exceed the maximum allowable overload input.

05. Never use the meter near equipment which generates strong

electromagnetic waves or is charged.

06. Never use the meter if the meter or test leads are damaged

or broken.

07. Never use the meter with the case or battery lid removed.

08. Be sure to use the fuse of the specified rating and

specification.

09. During measurement, do not hold the test pin side of the

flange of the test leads.

10.

To start measurement, first connect the ground side (black test

lead).

When disconnecting, the ground side must be disconnected last.

11. During measurement, do not change the meter to another

function or range nor replace the plugs to other terminals.

12. Before starting measurement, make sure that the function

and range are properly set.

13. Never use the meter when it is wet or with wet hands.

14. Be sure to use the specified type of test leads.

15. Never attempt repair or modification, except for battery and

fuse replacement.

16. Inspect the meter at least once a year.

17. This meter is for indoor use only.

1-3 Overload Protection

The maximum rated input value and overload protection have

been established for the input terminals of each function.

CD770P_英本文_四 06.4.28 3:38 PM ページ 2 (1,1)

—3—

[2] APPLICATIONS AND FEATURES

2-1 Applications

This is a digital multimeter designed for measurement of low-

voltage circuits. This meter is useful for measuring / analyzing

circuits of small communication devices, home electric appliances

and batteries within the CAT. III environment.

2-2 Features

•Safety design in compliance with the IEC61010-1. The current

terminal is protected with a safety cap.

•Easy-to-read display showing Eye-friendly large size LCD.

•Frequency measurement and capacitance measurement

functions provided.

•Easy-to-hold design.

•Test probes can be held on the body.

•Double molding with outside made of elastic elastomer material.

Classification of overvoltage measurement

Overvoltage measurement classification (CAT. I):

Line on the secondary side on the inside of equipment via a

transformer, etc. from the receptacle.

Overvoltage measurement classification (CAT. II):

Line on the primary side of equipment with power cord to be

connected to the receptacle.

Overvoltage measurement classification (CAT. III):

Line from the primary side or branch of equipment which directly

takes in electricity from a distribution board to the receptacle.

Overvoltage measurement classification (CAT. IV):

Line from the service conductor to the distribution board.

CD770P_英本文_四 06.4.28 3:38 PM ページ 3 (1,1)

—4—

Select button

LCD

Range hold

button

Relative button

Power switch &

function switch

Safety cap

μA/mA

Measuring

terminal

Data hold button

Measuring terminal

COM (common)

terminal

Test pins

Flanges

Test probe (red)

Test probe (black)

Plugs

TL-21

3-2 Test Leads

[3] NAMES OF COMPONENT UNITS

3-1 Meter

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—5—

3-2 Display

Indication of numerical value.

Indication of relative mode operation.

Indication of negative sign of

numerical data.

Indication of AC measuring function

operation.

Indication of DC measuring function

operation.



Indication of auto range mode operation.

Not used with this meter.



Indication of diode test function operation.

Indication of continuity check function

operation.



Indication of data hold mode operation.

Indication of relative mode operation.



Indication of battery low warning.

Indication of units of measurement.

CD770P_英本文_四 06.4.28 3:38 PM ページ 5 (1,1)

—6—

[4] DESCRIPTION OF FUNCTIONS

4-1 Power Switch & Function Switch

Turn this switch to turn on and off the power and select a

measuring function.

4-2 Measuring Function Selection:

When the button is pressed, the functions change as

follows:

•

Vposition: DC voltage ( ) AC voltage ( ) DC voltage ( )

•

/ / position: Resistance measurement ( ) diode test ( )

continuity check ( ) resistance measurement ( )

•

µA position: DC current ( ) AC current ( ) DC current ( )

•

mA position: DC current ( ) AC current ( ) DC current ( )

4-3 Data Hold:

When the button is pressed, the value indicated will be

held. (“ ” will appear on the display.) The indicated value will not

change if the measurement input fluctuates.

When this button is pressed again, the hold status will be

canceled and the meter will return to the measurement mode.

(“ ” will disappear from the display.)

Remarks:

The DATA HOLD button does not work with the function.

4-4 Range Hold:

When the button is pressed, the meter will be set in the

manual mode and the range will be fixed. (“ ” will disappear

from the display.) In the manual mode, each time this button is

pressed, the range changes. While checking the unit and decimal

point on the display, select the best range.

To return to the auto range, hold this button pressed for 1 second

or longer. (“ ” will appear on the display.)

Remarks:

The RANGE HOLD button does not work with the ( ), ( ),

( ) and ( ) functions.

CD770P_英本文_四 06.4.28 3:38 PM ページ 6 (1,1)

4-5 Relative Measurement:

When the button is pressed, and will light and the

input value when the button was pressed will become 0 as the

reference. To cancel it, press the button again.

Example: Display after pressing the button at DC30.00V input

Remarks:

This mode cannot be used with the function. When a function

other than ( ) is used, the range is fixed during relative

measurement.

4-6 Auto Power Off

If no switch or button is operated for Approx. 30 minutes after

power on, the power will automatically be turned off and the

display will become blank.

To reset the meter, press any button or remove the object to

measure from the DMM and set the function switch to OFF. Set

the function switch again according to the measurement and

connect the object to measure.

To cancel this function, turn on the power of meter while holding

the button pressed.

4-7 Battery Low Warning Indication

When the built-in batteries have been discharged and the voltage

has dropped to below Approx. 2.4 V, “ ” mark will appear in the

display. When this mark flickers or lights, replace both two

batteries with new ones.

Actual Input Value Value in Display

DC 30.00V DC 0.00V

DC 35.00V DC 5.00V

DC 25.00V DC -5.00V

—7—

CD770P_英本文_四 06.4.28 3:38 PM ページ 7 (1,1)

—8—

[5] MEASURING PROCEDURE

5-1 Start-up Inspection

1. Do not apply an input signal exceeding the maximum rated

input of each function.

2. During measurement, do not change the function switch.

3. During measurement, do not touch the test pin side of the

flange of the test lead.

4. When measurement has been finished, remove the test pins

from the object measured and return the function switch to the

OFF position.

WARNING

1. Be sure that the battery low warning mark is not flickering or lit, when

the meter is turned on. If it is flickering or lit, replace the batteries with

new ones.

2. Do not use the meter if the meter or test lead is damaged or broken.

3. Make sure the test leads are not cut and the fuse has not blown.

CAUTION

CD770P_英本文_四 06.4.28 3:38 PM ページ 8 (1,1)

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